do *not* silently ignore errors when saving libraries
do *not* silently ignore errors when saving libraries

In case of error, it leads to *data* *loss*.

Change-Id: I80d806ef10a3364174eced3095ebf1ea217d75b4

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core